arXiv subjects

Yi-Xin Shen

Publications and source records attributed to Yi-Xin Shen.

4 recordsLinked to original sources

arXiv2025

Channel-loss-independent quantum-enhanced interferometer

We propose a channel-loss-independent quantum-enhanced interferometer. In our scheme, the Fisher information for phase difference of weak light from a remote star remains constant under arbitrarily large channel loss, and the angular resolution of our method is better than that of prior quantum-enhanced methods in the long-baseline regime. Moreover, our method requires only threshold detectors and tunable coherent state or two-mode squeezed state sources, both of which are matured technologies nowadays.

quant-ph↗

arXiv2025

Piecemeal Telescope Array: Exponential Precision with Strong Robustness and High Efficiency

Optical telescopes are powerful eyes for terrestrial and astronomical detection. Here we propose a new detection method with high efficiency, strong robustness and super precision, as an enhanced technique for optical telescopes in angular locating. In detail, our method requests only small number of incident single-photons, holds strong fault tolerance to any noise and improves the precision by magnitude orders comparing with current optical telescopes. Given these advantages, our method promises an important progress in remote sensing and astrometry, especially in locating the very dark object.

quant-ph↗

arXiv2025

Piecemeal method revisited

Detecting the angles and orbits of remote targets precisely has been playing crucial roles in astrophysical research. Due to the resolution limitations imposed by the Airy disk in a single telescope, optical interferometric schemes with at least two telescopes have received considerable attention. We have extended the piecemeal method to reduce the required number of baselines for observation. Through the analysis of its performance under practical conditions, we demonstrate that both the original and extended piecemeal methods exhibit strong robustness against errors in baseline lengths and orientations. Under the same practical conditions, our approach achieves higher precision than other existing weak-light interference-based methods.

astro-ph.IM↗

arXiv2022

Post-selection in noisy Gaussian boson sampling: part is better than whole

Gaussian boson sampling is originally proposed to show quantum advantage with quantum linear optical elements. Recently, several experimental breakthroughs based on Gaussian boson sampling pointing to quantum computing supremacy have been presented. However, due to technical limitations, the outcomes of Gaussian boson sampling devices are influenced severely by photon loss. Here, we present an efficient and practical method to reduce the negative effect caused by photon loss. With no hardware modifications, our method takes the data post-selection process that discards low-quality data according to our criterion to improve the performance of the final computational results, say part is better than whole. As an example, we show that the post-selection method can turn a GBS experiment that would otherwise fail in a ``non-classical test" into one that can pass that test. Besides improving the robustness of computation results of current GBS devices, this photon loss mitigation method may also benefit the further development of GBS-based quantum algorithms.

quant-ph↗